Direct evaluation of ballistic phonon transport in a multi-walled carbon nanotube
Direct evaluation of ballistic phonon transport in a multi-walled carbon nanotube
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DOI：
10.1063/1.4869470
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发表时间：
2014-03
影响因子：
4
通讯作者：
H. Hayashi;Koji Takahashi;T. Ikuta;T. Nishiyama;Y. Takata;Xing Zhang
中科院分区：
文献类型：
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作者：
H. Hayashi;Koji Takahashi;T. Ikuta;T. Nishiyama;Y. Takata;Xing Zhang
报道了单根多壁碳纳米管（MWNT）中声子约束和热导的原位测量。用聚焦离子束（FIB）辐照连续缩短4.8 μm长的MWNT，最终得到0.3 μm长的MWNT。在第一次FIB照射后，与原始MWNT相比，电导降低了41%。这是因为具有长自由程的声子的贡献被FIB诱导缺陷处的散射排除。声子输运在连接的多长度的纳米管也进行了研究。
Phonon confinement and in situ thermal conductance measurements in an individual multi-walled carbon nanotube (MWNT) are reported. Focused ion beam (FIB) irradiation was used to successively shorten a 4.8 μm long MWNT, eventually yielding a 0.3 μm long MWNT. After the first FIB irradiation, a 41% reduction in conductance was achieved, compared with that of the pristine MWNT. This was because the contributions from phonons with long free paths were excluded by scattering at FIB-induced defects. Phonon transport in linked multiple-length nanotubes was also investigated.